Sdk/PhysicsComponent2D: Add IsValid() method

SDK/include/NDK/Components/PhysicsComponent2D.hpp

@@ -61,6 +61,7 @@ namespace Ndk
 
 			inline bool IsNodeSynchronizationEnabled() const;
 			inline bool IsSleeping() const;
+			inline bool IsValid() const;
 
 			inline void ResetVelocityFunction();
 

SDK/include/NDK/Components/PhysicsComponent2D.inl

@@ -382,6 +382,18 @@ namespace Ndk
 		return m_object->IsSleeping();
 	}
 
+	/*!
+	* \brief Checks if this component is bound to a valid rigid body
+	*
+	* A component may not be bound to a rigid body if the component is not bound to an entity or if this entity is being destroyed
+	* 
+	* \return true If bound, false otherwise
+	*/
+	inline bool PhysicsComponent2D::IsValid() const
+	{
+		return bool(m_object);
+	}
+
 	/*!
 	* \brief Reset velocity function to default one
 	*